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avision42
23.08.2019 •
Mathematics
Martin finds a shirt on sale for 10% off at a department store. the original price was $20 martin must also pay 8.5% sales tax. how much is the shirt before taxes are applied?
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Ответ:
cost times discount, then the discounted price times sales tax
so since we want before tax is applied, we disregard the 8.5% and find the 10% off
10% off means 90% (100-10=90)
so 90%=90/100=9/10
9/10 of $20
'of' means multiply with fractions
9/10 times 20=180/10=18
the shirt is $18 before tax
Ответ:
i am so sorry , i have no idea but i want points so i won't be a beginner anymore